If you’re hoping to get lost in the rain on your romantic getaway, take a look at these details about year-round temperatures in Weissensee: The hottest months are usually July and August, with an average temperature of 15°C, while the coldest months are January and February, with an average of 0°C. The rainiest months in Weissensee are November, August, May and June, with each month seeing an average of 244 mm of rainfall.